Navigation Links
Lizard 'third eye' sheds light on evolution of color vision

"related" proteins. However, gustducin and Go each activate different molecular pathways that work against each other physiologically. Blue light and gustducin generate an "off" response in the nerve cell while green light and Go generate an "on" response.

"It may seem strange to have two opposing signals in the same cell," says the study's senior author, King-Wai Yau, Ph.D, a professor in the Solomon H. Snyder Department of Neuroscience at Hopkins, "but the unique mechanism renders these parietal photoreceptors most active at dawn and dusk."

"So incorporating two different pigments and two separate signaling molecules in one cell may have been an economical way, in a primitive eye with relatively few cell types, to tell the transitions of the day based on changes in the spectrum of sunlight," says Chih-Ying Su, Ph.D., the first author of the study and a former neuroscience graduate student at Hopkins.

"It's just like in a small company," says Yau. "You have to delegate each person to do more things."

By sharing features found in human photoreceptors as well as those found in simpler organisms like the scallop, the researchers propose that the lizard's parietal eye photoreceptor cells represent a "missing link" between the light-sensing apparatus in lower animals and ours.

It turns out that some frogs and fish also have a spot on their foreheads that might play the role of a light-sensing third eye. Yau hopes to pursue these structures to obtain more clues about how our photoreceptor cells, the rods and cones, came about. As he says, he's most curious about how the same function can be achieved in different ways in different animals.


'"/>

Source:Johns Hopkins Medical Institutions


Page: 1 2

Related biology news :

1. Lizards shout against a noisy background
2. Bacteria collection sheds light on urinary tract infections
3. Sea skate experiment sheds light on human cell transport
4. Bacterial genome sheds light on synthesizing cancer-fighting compounds
5. Newly discovered genetic disease sheds light on bodys water balance
6. Multi-species genome comparison sheds new light on evolutionary processes, cancer mutations
7. Gene discovery sheds light on causes of rare disease, cancer
8. Skull study sheds light on dinosaur diversity
9. OHSU discovery sheds light into how stem cells become brain cells
10. Clock molecules sensitivity to lithium sheds light on bipolar disorder
11. Newly identified protein complex sheds light on axon growth mechanism
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Lizard third eye sheds light evolution color vision

(Date:1/22/2015)... 21, 2015  Analyst Report Issued by Small Cap IR. In ... that planet-wide, transactions at merchants on the leading payment cards ... of credit, debit, and prepaid cards reached 6.54 billion.  Eight ... fraudulent card usage in 2012, and credit and debit card ...
(Date:1/22/2015)... Infinisource has launched its new NXG series of time clocks ... a higher standard for collecting attendance and labor data and ... installation, touch screen interface and seamless connection to cloud-based iSolved, ... solution for the small to mid-size employer. The ...
(Date:12/22/2014)... , Dec. 22, 2014  The 2014 Holiday Season ... as Acuity Market Intelligence reports that the long anticipated ... forecasts that intensifying demand for smart phones, tablets, and ... global market of 2.5 billion users with nearly 4.8 ...
Breaking Biology News(10 mins):$4.80 Near Term Price Target with "Buy" given by CapRock Research for NXT-ID, Inc. (NASDAQ: NXTD) issued by Small Cap IR 2Infinisource's NXG series sets new time clock standard 2First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 2
... five of the seven wild cat species found on the ... tract of forest being rapidly lost to deforestation, WWF-Indonesia is ... the valuable area. Conducted in a forest of rich ... survey captured on camera the Sumatran tiger, clouded leopard, marble ...
... lower children,s chances of developing cardiovascular disease down the ... Findings from a recent Queen,s University study shows different ... young people,s health. "Even if a child is ... a short period of their whole day, so it,s ...
... Ditching the diet for Thanksgiving? Turkey with all ... to miss their goals, according to a new Cornell ... subconsciously bending willpower every day. "We,re slaves to ... and of psychology at Cornell, who co-authored the article ...
Cached Biology News:5 rare wild cat species caught on camera in Sumatra 2
(Date:1/22/2015)... Jan. 22, 2015  Transwestern | RBJ today announces the firm ... space for Shire a leading biopharmaceutical company, at Two Ledgemont ... RBJ,s Robert Richards , president, and Brian Cohen ... the entire five-floor building at 95 Hayden Ave. ...
(Date:1/22/2015)... | RBJ today announces the firm brokered a long-term lease ... leading biopharmaceutical company, at Two Ledgemont Center in ... , president, and Brian Cohen , senior vice president, ... at 95 Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... laboratory information management systems market is a rapidly growing ... due to factors such as rising pressure to comply ... and increasing government support for adoption of HCIT solutions ... the market focus on technological advancements to further the ...
(Date:1/22/2015)... Rootstown, OH (PRWEB) January 22, 2015 Crystal ... announced today that it has received AOAC-PTM Certifications for the ... O111, O121, and O145; collectively referred to as STEC or ... at 1 colony forming unit (cfu) per 325 g of ...
Breaking Biology Technology:Transwestern | RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Transwestern?RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 4Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2
... , , NASHVILLE, Tenn., Aug. 10 ... its initial public offering of 5,000,000 shares of the Company,s common ... raising $85.0 million in gross proceeds. In addition, the Company has ... additional 750,000 shares at the initial public offering price to cover ...
... ... offerings to bring powerful, dynamic, driver-based planning, forecasting and financial reporting solutions to ... ... provider of integrated budgeting, forecasting, consolidation and financial reporting solutions, today introduced a ...
... , SOUTH PLAINFIELD, N.J., Aug. 10 PTC ... milestone in its collaboration with Schering-Plough Corporation (NYSE: SGP ) ... development candidate for the treatment of hepatitis C virus (HCV) infection. ... p rnh/20010919/PTCLOGO ) , , ...
Cached Biology Technology:Cumberland Pharmaceuticals Announces Pricing of Its Initial Public Offering of Common Stock 2Centage Corporation Announces Planning Maestro Business Performance Management Software for Mid-Market Enterprises 2Centage Corporation Announces Planning Maestro Business Performance Management Software for Mid-Market Enterprises 3PTC Therapeutics Announces Achievement of Major Milestone in Schering-Plough Hepatitis C Collaboration 2PTC Therapeutics Announces Achievement of Major Milestone in Schering-Plough Hepatitis C Collaboration 3
Four siRNAs targeting your gene of interest, providing gene silencing with 100% satisfaction guaranteed High knockdown potency , High specificity for minimal off-target effects , Flexible siR...
... PHD2000 syringe pump series combines Harvard Apparatuss best ... and a wide range of configuration options. A ... dimensions of syringes from all the major manufacturers. ... all the pertinent information from across the lab. ...
... Drosophila S2 cells are used ... Expression System (DES). The S2 cell ... late stage (20-24 hours old) Drosophila melanogaster ... grows rapidly at room temperature without CO2 and ...
... syringe pump series combines Harvard Apparatuss best pump ... a wide range of configuration options. A lookup ... of syringes from all the major manufacturers. A ... the pertinent information from across the lab. All ...
Biology Products: